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A247679 Composite numbers congruent to 17 modulo 18. 8
35, 125, 143, 161, 215, 287, 305, 323, 341, 377, 395, 413, 485, 539, 575, 611, 629, 665, 737, 755, 791, 845, 899, 917, 935, 989, 1007, 1025, 1043, 1079, 1115, 1133, 1169, 1205, 1241, 1295, 1313, 1331, 1349, 1385, 1403, 1421, 1457, 1475 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subsequence of A017257 (9n + 8).

LINKS

Odimar Fabeny, Table of n, a(n) for n = 1..10000

FORMULA

a(n) ~ 18n. - Charles R Greathouse IV, Sep 27 2014

MATHEMATICA

Select[18Range[100] - 1, Not[PrimeQ[#]] &] (* Alonso del Arte, Sep 25 2014 *)

Select[Range[17, 1500, 18], CompositeQ] (* Harvey P. Dale, Jun 19 2022 *)

PROG

(PARI) lista(nn) = {forcomposite(n=1, nn, if ((n % 2) && ((n % 9) == 8), print1(n, ", ")); ); } \\ Michel Marcus, Sep 22 2014

CROSSREFS

Cf. A017257, A247676, A247678, A247681, A247682, A247683.

Sequence in context: A284876 A216268 A098218 * A344013 A225930 A209370

Adjacent sequences: A247676 A247677 A247678 * A247680 A247681 A247682

KEYWORD

nonn,easy

AUTHOR

Odimar Fabeny, Sep 22 2014

STATUS

approved

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Last modified January 28 23:36 EST 2023. Contains 359905 sequences. (Running on oeis4.)